Worm with replaceable worm teeth

The utility model discloses a worm with a replaceable worm gear, which comprises a connecting device, a limiting sleeve, a connecting worm gear, a fixed sliding groove, a positioning slot and a positioning clamping groove, and the center of the upper end face of the limiting sleeve is fixedly connected with the connecting worm gear used for transmission. And four sets of fixing sliding grooves are evenly formed in the positions, close to the end, of the inner end face of the limiting sleeve at equal intervals, and a positioning clamping groove is formed in the bottom of the inner end face of the limiting sleeve. By arranging the connecting device, if the connecting worm gear needs to be assembled or separated, the threaded connecting rod can drive the connecting top plate to ascend or descend in the fixed sliding groove, and then the four sets of positioning clamping blocks are driven to be inserted into the positioning inserting grooves or separated from the positioning inserting grooves; and therefore, a us